Chamblee's Seismic Design Category, explained

Chamblee carries Seismic Design Category C under USGS's ASCE 7-16 model. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Nationally, Chamblee ranks above 69% of the 4,875 cities in this dataset for seismic hazard - the 69th percentile.

Chamblee by the numbers

The raw figures: peak ground acceleration 0.097g, short-period spectral response 0.192g, 1-second spectral response 0.087g. Among 148 Georgia cities in this dataset, Chamblee ranks 71 for seismic hazard, the 52th percentile within the state. About 32,321 people live in Chamblee, Georgia.

Retrofit economics for Chamblee

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Georgia. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Chamblee address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Chamblee's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.